Impulse-starter.



P. A. WILEY.

IMPULSE STARTER.

APPLICATION FILED JAN. 19,}916.

' Patented July 4, 1916.

2 SHEETS-SHEET I- P. A. WILEY. lMFULSE STARTER.

I APPLICATION YILED JAN- IQ, 1916- 1,1 89,326. y Patented July 4, 1916.

2 SHEETS-SHEET 2- To all whom it may concem UNITED STATES .PA'rENT OFFICE.

PORTER A. WILEY, OF KOKOMO, INDIANA, ASSIGNOR TO KOKOMO ELECTRIC OO., OF

KOKOMO, INDIANA, A CORPORATION OF INDIANA.

mrunsn srmrnn.

Application filed was 19, 1916. Serial m5. aesa.

Be it known thatI, Poem A. WILEY, a citizen of the United States of America, re-

siding atJ Kokomo, in the county of Howard and State of Indiana, have invented certain new and useful Improvements in Impulse- Starters, of which the following is a specification, reference being had therein to the accompanying drawings. I

In the operation of magneto systems for automobiles, engines, and like places, .it is desirable that they be started at high speed to at once obtain the desired excitations in the armature and the resultant intense sparks.

This invention relates to an impulse starter for magnetos and to an arrangement thereof whereby a quick throw is given to the magneto to obtain the desired initial and efl'ective sparks, the starting device being so devised as to be inoperative during the normal operation of the engine at full speed, andthere being a minimum number of partsto get out of order.

The invention consists in the matters herepointed out in the appended claims. 7

In the drawings, Figure 1 is aview in side elevation of a magneto provided with an impulse starter that embodies features of the invention; Fig. 2is a viewIin end elevation thereof; Fig. 3 is a vi evgin detail of a coupling member; Fig. 4 is a iew in detail of a releasing yoke";Fig.,5 is etail of a main drum and housing;.Fig 6 f' a-view in end elevation, partially broken away, showing the starting device assembled and ininitial or disengaged position; Fig. 7 is a similar view of the assembled starter'after a part turn has beengiven to the operating parts; Fig. 8 is a view in end elevation, partially broken away and'in section, showing the position assumed by the starter at high speed, and Fig. 9 is a view in section taken on or about line IX-JX of Fig. 7.

As herein shown, the armature shaft 1 of an electric generator or magneto of conventional type has the sleeve hub 2 of a drum Y 3s-keyed thereto or otherwise made fast, a

.f, t ofl prevent endwise movement.

suitable 'nut' 4 or like means being provided An oval "sh a e d yoke;-5 ,loosely encircles the sleeve an -is madejwith a radially projecting finger initial position with the starter and the magneto "rest, drops through a slot in the rim 7 of the member}! and thereby encounters and bears against a stop 8 mounted or formed on the main frameof the magneto 1n any suitable manner. 1 v

A member 9 is rotatablymounted by a central bushing 10 or hubon the sleeve 2 of the drum 3, awasher 24 or the like prevent- 1 -ng endwise movement. An end cam or proectlon 11 formed on the innerjend of the bushing 10 by cutting away apart thereof, is so disposedas to underlie a corresponding cam segment 12 on the proximate face of the yoke 5, the partsbeing so disposed that when the end cam 11 is concentric with the inner face of the cam segment 12, a rounded cam point.13 on the'yoke 5 back ofthe plane of the segment 11, rides upon the portion 11 as indicated in Fig. 7, and causes the with- .drawal of the finger 6 from engagement finger 6 to contact withthe stop 8. An ininafter set forth, and more particularly,

ner tongue 14 opposite the projection 6 of P tente Jui 4, 191

the yoke 5, is adapted to engage with a corresponding notch 15 cutin the face of the cam projection 11, when the yoke assumes the position'shown in Fig.8 under centrifugal motion. A stop 16 onthe face of the member 9 cooperates with'a stop 17 on the inner face of the rim 7, to limit the relative movements of the drum and coupling member when not interlocked by the engagement ofthe tongue 14. A flat coiled spring 18 encircles the sleeve 2 and is anchored at one end as indicated at 19 to the rim 7 and at the other end has an inturned end portion engaging a slot 20 at 'a convenient point in the hub sleeve 10 of the coupling member 9.

An outer annular flange 20-on the member 9 is notched or otherwise arranged for connection with a coupling flange 22 and a drive shaft 23 or the like.

7 In operation, with the parts in position shown in Fig. 6 and the projecting finger 6 of the yoke 5 extending through the rim .of the casing and engaging the stop 8, a part armature shaft to snap forward, the parts assuming substantially the position indicated in Fig. 7. As the magnetopicksjup it gains speed because of the response of the engine through proper firing of the charge because of the adequate sparks thus obtained, the Weighted portion of the yoke 12 formed by the cam segment 12 thereon, withdraws the yoke into the casing and into the position shown in Fig. 8 by centrifugal force and the tongue 14 enters the slot '20, locks the drum and coupling member together to be driven from the power shaft 23. When the magneto stops, the parts reassume the position indicated at Fig. 6. As a result of this construction, a quick start or impulse is given the generator by the device herein indicatedwhich insures the necessary heating sparks while the generator or magneto is driven positively when the engine picks up speed. There are no pivoted levers, screws or like parts that are subject to disarrangement, and the device is automatic in action, and when once assembled, readily takes care of itself without particular attention on the part of the user.

Obviously, changes in the details of co struction may be made without departing from the spirit of my invention and I do not care to limit myself to any particular form or arrangementof parts.

What I claim is 1. An impulse starter for an electric generator comprising a main drum adapted to be non-rotatably secured to the rotatable driving part of a generator, a coupling member rotatable relative thereto, a radially oscillating yoke revolving with the drum and engaging positively with the coupling member when at the limit of the motion of the yoke caused by centrifugal force, a stop engaging the yoke and drum from rotation when at the other limit of motion, a spring yieldingly connecting the drum and permitting relative rotation of them, and coiiperat ing cams on'the yoke and coupling adapted to move the yoke into a position intermediate the point of engagement of the drum and with the coupling when the spring is placed under stress by forward movement of the coupling relative to the drum.

2. An impulse starter for an electric generator comprising a main drum adapted to be non-rotatably secured to a rotatable driving part of a generator, a coupling member rotatable relative to the drum, a radially oscillatory yoke mounted in the drum to revolve therewith and'adapted to engage posimeaaae tively with the coupling member when at the limit of motion of the yoke caused by-centrifugal force, a stop engaging the yoke and drum from rotation when the drum and yoke are at rest, a spring yieldingly connecting the drum and member, a cam point on the yoke, and a cooperating cam part on the coupling adapted to move the yoke into disengagement with the stop and. with the coupling when the spring is pressed by the forward movement of the coupling relative to the yoke and drum.

3. An impulse starter for an electric generator'comprising a main drum adapted to be non-rotatably secured to a rotatable driving member of a generator, a yoke turning with the drum and oscillatory radially therein under the influence of centrifugal force,a stop engaged by the yoke for arrest ing the rotation of the latter and the drum When the yoke is at the other limit of motion, a finger on the yoke adapted to interlock positively with the coupling member when the yoke is at the limit of motion caused by centrifugal force, a spring yieldingly connecting the drum and coupling and providing limited forward movement of the coupling relative to the drum, and cooperating cam parts on the yoke and coupling adapted to release the yoke from the stop and from the coupling when the coupling is at the forward'limit of motion provided for by thespring. I

4. An impulse starter for an electric generator comprising a main drum adapted to be non-rotatably securedto a rotatable driving part of a generator, a coupling member rotatable relative to the drum, a radially oscillating yoke revolving with the drum and engaging with the coupling when at the limit of motion of the yoke caused by centrifugal force, a stop adapted to intercept aml lock the yoke and drum from turning "when the yoke is at the other limit of motion", cam members on the coupling and yoke adapted to move the yoke into the released position from the stop and drum, and a spring permitting movement of the coupling member relative to the yoke into the cam releasing position and driving the drum forward.

In testimony whereof I aflix my signature in presence of two witnesses.

PORTER A. WILEY. Witnesses:

M. F. GRACE, PAUL BURKE. 

